How to avoid error:Cannot set value to restricted members: "FCCS_MVMTS_FX_MOVEMENT

Content

The conversion makes when an Entity is foreign currency, it applies that exchange currency and the exchange differences are calculated in movement "FCCS_Mvmts_FX_Movement", in the same account. I want to reclass that exchange currency from that account to another one but it's automatically calculated by the system. Then I try to create a rule but I can't make any rule with this movement because it's a restricted member. I can't put that member in a FIX or a member block or directly in the formula, I always get the same error: [Error Message] Cannot set value to restricted members: "FCCS_MVMTS_FX_MOVEMENT